Oracle實用小技巧，oracle小技巧

Oracle實用小技巧，oracle小技巧

1、 閃回

批註：delete “T_SPC_ROOM”表，但沒有commit可以用以下命令還原回來。

<span style="color:#000099;">flashback table MW_APP.T_SPC_ROOM to before drop</span>

2、處理特殊字元

批註：插入帶有&等特殊時，Oracle提示為變數。有以下兩種方法：

<span style="color:#000099;">select 'abc'||chr(38)||'efg' from dual;select 'abc'||'&'||'efg' from dual;</span>

3. 匯入或匯出

說明：匯入或匯出一張表

<span style="color:#000099;">imp system/system@sgtms file=e:\datatable\t_pub_tables.dmp fromuser=(mw_app) touser=(mw_app) exp system/system@sgtms tables=mw_app.T_MAINTAIN_UNIT file=e:\T_MAINTAIN_UNIT121101.dmp log=e:\T_MAINTAIN_UNIT121105.log</span>

4. 刪除當年使用者下某類對象

--delete all tablesselect 'drop table ' || table_name ||';'||chr(13)||chr(10) from user_tables;   --delete all views select 'drop view ' || view_name||';'||chr(13)||chr(10) from user_views;   --delete all seqs select 'drop sequence ' || sequence_name||';'||chr(13)||chr(10) from user_sequences;  --delete all functions select 'drop function ' || object_name||';'||chr(13)||chr(10) from user_objects where object_type='FUNCTION';   --delete all procedure select 'drop procedure ' || object_name||';'||chr(13)||chr(10) from user_objects where object_type='PROCEDURE';   --delete all package select 'drop package ' || object_name||';'||chr(13)||chr(10) from user_objects where object_type='PACKAGE';